Cup holder



FIG. 1 is a perspective view of a cup holder showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof; and,

FIG. 6 is a side view thereof.

The ornamental design for a cup holder, as shown and described.